---You look excited!
---I the expensive dictionary that I left in the library yesterday.
A. am finding
B. found
C. have found
D. had found
网友回答
A. am finding
B. found
(答案→)C. have found
D. had found
解析：考查时态：句意：--你看起来很想兴奋！--我找到了昨天忘在图书馆的昂贵的字典了。从You look excited!可知这里强调的是现在已经找到了，这个结果，用现在完成时，选C。